I have a comma-separated record and I'd like to use sed to pull the Nth record from it.
It seems like it'd need to be something like this: sed -n 's/'"\,$1\,"'/&/p'
Am I close? (3 Replies)
does anyone have an awk one-liner to:
print the first line, the second line, then every Nth line, and the last line of a file.
Thanks,
Kenny. (5 Replies)
Hi,
I have a input file with the following entries:
1one
2two
3three
1four
2five
3six
1seven
1eight
1nine
2ten
The output should be
1one
2two
3three
1four
2five
3six (2 Replies)
Hi,
I have a input file with the following entries:
1one
2two
3three
1four
2five
3six
1seven
1eight
1nine
2ten
2eleven
2twelve
1thirteen
2fourteen
The output should be: (5 Replies)
Hi,
For my reuirement, I have to read a file from the 2nd line till the last line<EOF>.
Say,
I have a file as test.txt, which as a header record in the first line followed by records in rest of the lines.
for i in `cat test.txt`
{
echo $i
}
While doing the above loop, I have read... (5 Replies)
can you please tell me
(1) how to delete 1st and 3rd line only from a file.
(2) How to delete last 4 lines in a file that has 2 blank lines out of last 4 lines.
Thank you. (2 Replies)
Is there an awk script that can easily perform the following operation?
I have a data file that is in the format of
1944-12,5.6
1945-01,9.8
1945-02,6.7
1945-03,9.3
1945-04,5.9
1945-05,0.7
1945-06,0.0
1945-07,0.0
1945-08,0.0
1945-09,0.0
1945-10,0.2
1945-11,10.5
1945-12,22.3... (3 Replies)
Hi all,
Greetings. I am facing some troubles and hope that the professionals here could help me.
I am handling a large dataset, and part of it is like below:
1 ab139 0 752566 G A
1 ab151 0 846808 T C
1 ab142 0 854250 G A
1 ab061 0 861808 A G
1 ab043 0 873558 T G... (4 Replies)
Hi All,
I am using UNix Sun OS sun4u sparc SUNW,SPARC-Enterprise
My intention is to insert a line of text after 13th line of every file inside a particular directory.
While trying to do it for a single file , i am using sed
sed '3 i this is the 4th line' filename
sed: command garbled: 3... (5 Replies)
My file (the output of an experiment) starts off looking like this,
_____________________________________________________________
Subjects incorporated to date: 001
Data file started on machine PKSHS260-05CP
**********************************************************************
Subject 1,... (9 Replies)
Discussion started by: samonl
9 Replies
LEARN ABOUT DEBIAN
inotail
INOTAIL(1) Inotify enhanced tail INOTAIL(1)NAME
inotail - A fast and lightweight version of tail using inotify
SYNOPSIS
inotail [OPTION]... [FILE]...
DESCRIPTION
inotail is a replacement for the 'tail' program found in the base installation of every Linux/UNIX system. It makes use of the inotify in-
frastructure in recent versions of the Linux kernel to speed up tailing files in the follow mode (the '-f' option). Standard tail polls the
file every second by default while inotail listens to special events sent by the kernel through the inotify API to determine whether a file
needs to be reread. Note: inotail will not work on systems running a kernel without inotify. To enable inotify, please set CONFIG_INOTIFY=y
in your Linux kernel configuration and recompile it.
Currently inotail is not fully compatible to neither POSIX or GNU tail but might be in the future.
OPTIONS -c N, --bytes=N
output the last N bytes. If the first character of N is a '+', begin printing with the Nth character from the start of each file.
-f, --follow
keep the file(s) open and print appended data as the file grows
-n N, --lines=N
output the last N lines (default: 10) If the first character of N is a '+', begin printing with the Nth line from the start of each
file.
-v, --verbose
print headers with file names
-h, --help
show help and exit
-V, --version
show inotail version and exit
AUTHOR
Written by Tobias Klauser <tklauser@distanz.ch>
SEE ALSO tail(1), inotify(7)
2006-08-13 INOTAIL(1)